D-Link DPH-400SE Broadband Internet IP Phone

The D-Link DPH-400SE is a reliable and feature-rich broadband internet IP phone designed for small to medium-sized businesses and home offices. It supports up to six SIP accounts, providing flexible multi-line communication. With a clear color LCD display and advanced call management features, the DPH-400SE ensures efficient and seamless VoIP telephony. Its dual Ethernet ports with Power over Ethernet (PoE) support and robust security options make it ideal for professional environments requiring high-quality voice communication and network integration.

Product Features

Multi-Line Support

Supports up to 6 SIP accounts, allowing multiple simultaneous calls. Includes caller ID display, call history with up to 300 entries, and a phone book capable of storing 500 contacts with XML and LDAP directory support.

User Interface

Equipped with a color LCD screen for clear visuals. Features a 12-key numeric keypad, 4 soft keys, and a 4-way navigation pad for easy operation. Audio controls include volume adjustment, mute, speakerphone, and headset compatibility.

Connectivity and Networking

Includes two 10/100Base-TX Ethernet ports — one for WAN and one for LAN connection. Supports IEEE 802.3af Power over Ethernet (PoE) for streamlined power and data transmission. Compatible with essential protocols such as SIP, RTP, STUN, DNS, and SNTP to ensure broad interoperability and reliable NAT traversal.

Audio and Call Management

Supports a wide range of voice codecs including G.711a/u, G.729A/B, G.723.1, G.726-32, and G.722 for clear, high-quality audio. Advanced features like acoustic echo cancellation, voice activity detection, jitter buffer, and packet loss concealment enhance call clarity. Call management functions include hold, transfer, forward, call waiting, three-way conferencing, do not disturb (DND), call pickup, and busy lamp field (BLF)/presence.

Security and Quality of Service

Offers VLAN support for voice and data segregation, QoS compliance with IEEE 802.1Q/p and DiffServ (DSCP) for prioritizing voice traffic. VPN compatibility includes L2TP and OpenVPN support for secure remote communications. Firmware can be remotely managed via FTP, TFTP, or HTTP with auto-provisioning capabilities.

Product Specifications

• Lines Supported: Up to 6 SIP accounts
• Display: Color LCD
• Keypad: 12 numeric keys, 4 soft keys, 4-way navigation pad
• Ethernet Ports: 2 x 10/100Base-TX (WAN and LAN)
• Power: 5V DC, 1A adapter (not included); IEEE 802.3af PoE Class 2 support
• Voice Codecs: G.711a/u, G.729A/B, G.723.1, G.726-32, G.722
• Audio Features: Acoustic echo cancellation (G.167), voice activity detection, jitter buffer, packet loss concealment
• Call Features: Hold, transfer, forward, waiting, three-way conference, DND, call pickup, BLF/presence
• Protocols: SIP RFC 3261, RTP, STUN, DNS, SNTP
• VLAN Support: Voice and data VLANs
• QoS: IEEE 802.1Q/p, DiffServ (DSCP)
• VPN Support: L2TP, OpenVPN
• Firmware Upgrade: Remote upgrade via FTP, TFTP, HTTP; auto-provisioning
• Dimensions: 240 x 185 x 45 mm
• Weight: Approximately 1 kg
• Operating Temperature: 0°C to 40°C
• Storage Temperature: -20°C to 60°C
• Operating Humidity: 10% to 65% non-condensing
• Storage Humidity: 15% to 85% non-condensing

The D-Link DPH-400SE offers an ideal balance of performance, connectivity, and security features that make it well-suited for professional IP telephony needs.